What is the air quality in Portsmouth today?

The current Air Quality Index (AQI) in Portsmouth is 30 (Good). PM2.5 concentration is 7.09 µg/m³.

What is the temperature in Portsmouth right now?

The current temperature in Portsmouth is 33.5°C (feels like 33.5°C). Humidity is 35.7% and wind speed is 19.8 km/h.

Is it safe to go outside in Portsmouth?

Air quality is satisfactory. Enjoy outdoor activities. The UV Index is 10.9 (Extreme).

Air Quality in Portsmouth, United States

Clear

33.5°C · 35.7% humidity

33.5°

Feels 33.5°

Good

Air quality is satisfactory. Enjoy outdoor activities.

Calibrated model

Nearby Monitoring Stations

AQI Forecast

34 1pm

30 4pm

34 7pm

27 10pm

24 1am

24 4am

24 7am

25 10am

Air Quality Index Trend

31h · 1 stn

View full history →

Portsmouth's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration.

35.7%

Humidity

19.8 km/h

Wind E

1011.2 hPa

Pressure

10.9

UV Extreme

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲

7.09 µg/m³

PM10

13.7 µg/m³

050100150200300500

What is the weather forecast for Portsmouth?

Temperature & Precipitation

PM2.5 Trend

31h · 1 station

PM2.57.09 µg/m³ ✓ WHO

Good

PM1013.7 µg/m³

Good

UV INDEX10.9

Extreme

What is the 7-day forecast for Portsmouth?

07-21

33.5° 20.3°

0.44 mm

07-22

26.6° 19.0°

0.81 mm

07-23

23.8° 17.1°

0.25 mm

07-24

25.4° 16.2°

0.81 mm

07-25

22.5° 18.7°

1.5 mm

07-26

30.5° 17.8°

6.44 mm

07-27

28.7° 20.8°

0.19 mm

Both models agree Avg diff: 2.8°C

What cities are near Portsmouth?

31 Ashland 31 Meads 31 Huntington 28 Chillicothe 69 Lancaster 57 Grove City 55 Pickerington 50 Lebanon 45 Fort Thomas 51 Winchester

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Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-07-21T20:19 UTC.